Extenders
Lens specifications when using extender EF1.4x III or EF2x III are as follows.
| |
EF1.4x II/III |
EF2x II/III |
| Focal length (mm) |
560 |
800 |
| Aperture |
f/5.6 - 45 |
f/8 - 64 |
| Angle of View |
Diagonal |
4° 25' |
3° 5' |
| Vertical |
2° 25' |
1° 40' |
| Horizontal |
3° 40' |
2° 35' |
| Maximum magnification (X) |
0.18 |
0.26 |
 |
- Attach the extender to the lens, and then attach the camera. To remove it, reverse the order. Errors may occur if you attach the extender to the camera first.
- With Extender EF2x II/III attached to the lens, only manual focus is possible. However, with the EOS-1D X*, EOS-1Ds Mark III, EOS-1Ds Mark II, EOS-1Ds, EOS-1D Mark IV, EOS-1D Mark III, EOS-1D Mark II N, EOS-1D Mark II, EOS-!d, EOS 5D Mark III*, EOS-1V/HS, EOS-3 camera, autofocusing with the center focusing point is possible.
- When shooting with EOS A2/A2E/5, use -0.5 step exposure compensation when using extender EF1.4x II, and use -1 step exposure when using extender EF2x II.
- Extenders cannot be used more than one at a time.
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 |
- Autofocusing is still enabled with extender EF1.4x II/III attached.
- When an extender is attached, the AF speed will become slower to retain proper control.
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* AF can be used by updating your camera's firmware. Please check the Canon website for information about firmware updates.
